The next rerating comes from resource definition

By June, more than 500 Tallebung holes had been completed, compared with 115 holes underpinning the prior MRE. The pending update therefore has a materially larger drilling database from which to assess the project and inform the next study cycle; the investment consequence depends on what that additional work demonstrates, not simply on the hole count.

1. 01Evidence base: The expanded programme increases the scope for resource confidence and mine-planning inputs ahead of the awaited MRE update.

The 3 June issue of SEARs, following the Scoping Report, moved Tallebung into the EIS phase. The appointment of an Environmental Manager and commencement of baseline work add a defined approvals process alongside the technical programme, making development sequencing more concrete than it was at the FY2025 Annual Report date.

1. 01Regulatory consequence: Environmental work is now progressing against formal NSW requirements rather than remaining an exploration-stage intention.
2. 02Near-term test: The company must now convert the enlarged drilling and approvals work into the updated MRE and PFS; those releases remain the missing confirmation of progress as at 19 July.

The August 2025 bulk sample tested 75.4t across four samples through a two-stage TOMRA XRT circuit. Stage 1 upgraded 0.17% Sn feed to 2.32% Sn at 94.8% tin recovery; Stage 2 produced 10.8% Sn at 70% recovery, with more than 90% mass rejection. This testwork supports a potentially smaller downstream plant, with lower material throughput, water, energy and tailings intensity, but the economic case depends on integrated, representative performance rather than the headline uplift.

1. 01The proposed route remains to be engineered: dense-media separation on fines and Stage 2 sort waste, followed by pilot-scale gravity processing, must deliver consistent saleable cassiterite concentrate across representative variability.
2. 02The failure case is measurable: materially lower recovery than the reported Stage 1 result, or inconsistent concentrate quality at scale, would weaken the lower-intensity processing premise and leave Tallebung as a pre-study exploration option.

Tallebung has entered NSW SSD scoping, but approvals confidence depends on completing baseline datasets and defining a stable development envelope. The updated MRE and PFS remain unconfirmed as at 19 July 2026, while final integrated concentrate results and representative variability testing are not disclosed. We therefore view asset quality as constructive, but study-level engineering and approvals confidence as incomplete.

1. 01Approvals risk is an envelope risk: incomplete baseline work or a changing mine and processing footprint could extend the path from scoping into EIS development.
2. 02Secondary exploration remains conceptual: Doradilla’s 10–15Mt Exploration Target at 0.32–0.42% Sn is an option, not a Mineral Resource, and does not alter Tallebung’s primary underwriting burden.

1. 01The MRE-to-PFS sequence is the highest expected-value catalyst because it can shift Tallebung from drill-led optionality towards a measurable development case.
2. 02Repeatable sorting is more likely than the market implies because 2025-26 bulk-sample work and pilot optimisation are already underway; success would increase study value.
3. 03A PFS released after the updated MRE would test whether shallow intercepts, ore rejection and by-product potential support an acceptable mine plan, rather than isolated headlines.

1. 01Why buy? Own only if the MRE-to-PFS sequence reduces the developer discount and the EIS converts the concept into a credible schedule.
2. 02Why avoid? Wait if the updated MRE or PFS is not released by Q4 2026, cutting the Tallebung study-value sleeve and extending pre-revenue uncertainty.
3. 03What would make us wrong? A non-repeatable sorting outcome or an EIS timetable extending beyond 2026 would leave the market underwriting value not yet evidenced.